HIGH EFFICIENCY TOILET FLUSH VALVE { 1.28gpf / 4.8Lpf Per Flush ) 8402-128 fished chrome plated flush valve, chlorine res ant Self Cleaning Bypass diaphragm. 1.28 gallons per flush. externally adjustable. with 1” candle resistant capped screwdriver angle stop with back-check, sweat adapter kit, renewable main valve sear, metal “Robber flex” oscillating handle, “Turn-to-Silence™ equipment, with Slip-Doing adjustable tailpiece. vacuum breaker, wall flange, spud nut and spud flange for 147 top spd.